Metal working tool



Juli 29, 1952 R. A. MILLHOLLAND ETAL 2,604,800

METAL WORKING TOOL 2 SHEETS-SHEET l Filed Nov. 4, 1946 E y m\\ Y`-//// WW//A July 29,1952 R. A. MILLHOLLAND ET AL 2,604,800

METAL WORKING TOOL 2 SI-IEETS--SHEET 2 Filed Nov. 4, 194@ Patented July 29, 1952 UNITED STATES PATENT ol-FICE METAL WORKING TOOL:

Raymond A. Millholland and rnest Millholland,

Indianapolis, Ind.

Application' November 4, 1946,'seria1No. 707,606

This invention relates to a metal-working tool and has for its principal object the production of a simple and inexpensive tool which can be used to perform, on relatively light bar stock slide adapted to carry a metal-Working tool at its inner end. Associated with the arm we provide a means for adjusting and controlling the position of the cross-slide. The frame is provided in addition to the arm with a longitudinally extending member, Ipreferably removable, which is disposed parallel to but spaced from the rstockreceiving opening and which is adapted toy support in line with the stock a support for a drill or adjustable boring bar. In the operation of the device, it is supported and positioned by the engagement of the stock in the stock-receiving opening, the stock being rotated in -any convenient manner as by securing' it inthe chuck of a drill press, breast drill, lathe, or bit-brace `or in any other appropriate Work-rotating means.

The vaccompanying drawings illustrate ,our invention: Fig. 1 isa plan view of the device with portions broken away tc'illustrate the; construction more clearly; Fig. 2 is a transverse section on the line 2-2 offFig..-1; Fig. 3 is a side ing the manner in which the device can be employed to perform a metal-turning or cut-ofi operation in an ordinary drill press; Figs. 5 and 6 are fragmental views similar to Figs. 1 and 2 illustrating the use of the device in the performance of La milling operation; Fig. 'l is a View similar to Fig. 1 illustrating another use .of the device; and Fig. 8 is a view similar to Fig. 1 illustrating a further use of the' device.

As will be clear from Fig. 1, the device embodies a frame I0 provided with a bearing Vportion I I adapted to receive the bar stock which is to be'machin'ed.V By providing-for thebearing portion II a set of alternatively usable bushings I2 having the same external diameter but varying internal diameters, the device maybe adapted to operate on bars of different diameters. lf stock of. polygonal or other non-circular cross 2 appropriately shaped central opening .may l) employed. If the stock is polygonal in cross section, it is of course essential that the bushing be rotatable inthe bearing; but Where round stock is to be used, it is immaterial whether or not the bushing I2 is' free to rotate in the bearing. Adjacent one end of the bearing I I, the frame is provided with a laterally extending arm I5..in which a cross-slide I6 is received for sliding movement radially of the bearing II. At :its innerendthe cross slide IS is provided .with a longitudinally extending openingV for the reception of a tool bit Il andfwi'th 'one or morecset screws I8 or other means for holding such tool bit imposition. The outer endof theslide.- -IB is provided with a screw-threaded'recess I9 which receives an adjusting screw 20 securedinany v elevation of the device; Fig. 4 is a view llustrat- -itself relative to the arm I5.

At a point radially displaced from the arm ;I5, the bearing II is provided with a longitudinally extending bossl 25 provided with a longitudinally extending opening in-which a bar 26 is adapted to be removably received. A set screw-21er equivalent means is provided to secure vthe bar 26 in position. Beyond the arm I5, there `is mounted onthe lbar 26 a support 28, conveniently a block of metal. The support 28 isprovided with Van opening 29 extending through it parallel to the bar 26 and spaced therefrom a distance equalntothe distance between' the axis o isuch vbar and the'axis of the` bearing II, so that-by properly positioning the support 2B aboutthe axis of the bar 2S the opening 29 may beflllfle coaxial with'theibearing' I-`I.' A set-screw 30, or equivalent, may be employed to secure 'theA sup- 'lport 28 in any position of ladjustmentabout the for the reception of va boring bar`33- whichris section is to be machined. a lbushingihaving anV secured in position in `the slot as by means of a set screw 34. An adjustingscrew 35 is mounted inthe support28 in position to bear against one end of the slide 32 to locate it radially with relationto the `bearing I I and thus-to determine .the diameter cfany holeboredkby the boring bar 33 in the end of stock` supported inthe bearing Depending upon the type of work to be performed, the devicel may be used eitherwith or without the support 28 in position.` Formost turning operations, it will be convenient if the support 28 and bar 26 'are removed from; associay tion with the frame I0. The tool bit-I1 vS1113- ported in the cross slide I6 may be of any of the forms commonly used in metal-turning operations, the cut-off tool illustrated in Fig. 1 being shown merely as an example. For reducing the diameter of bar stock, it will of course be understood that an appropriately ground metal-turning bit will be employed. l

In performingaflturning orlother external-.operationon"apiece 'of bar stock, abushing I2-is first selected and placed in the bearing II. A suitable tool bit is inserted and secured in the slide I6, and such slide is adjusted by-l operation of the screw 20 to set the tool to turn the stock to the desired radius. Theffstock vis lthenflfed through the opening in the bushing I2 wl-iile1it= and the frame I are being-.rotatedrelatively.to

each other.

rotation is obtained is entirely immaterial. .For

example, the stock maybe mounted in the chuck s! iauldrillpress, breast v. drill, or bitbrace,y or Vit @mayebesecurednin tlfieichuclfr.` or collet 'of-fa Ylathe, .iif-ailathe'zisavailable vAlternativelyy the stock :may beiliel'drstationary,asin aivise.-l while lthe `ffi"a;rn'ef.-I`l isrotatedfaboutit-.manually "By aprpxiopriate-zadjustment of the slide I6, stock -sup- :rported Athe bushing.:` I 2V ,may be vturned ftoany ...desiredldiametein "3Io1sevenaturnednpieoe of fwork from the Abar #s'tock aicuteoixtoolffzsuch as'that indicated in F1g.l1,'may='.be iiempleye'd, z the stock l and :frame I'IIL-being' heldlin'xed :axial :position relative to f-'thefstockcas ithetooli'scfed radially .by 'adjustlm'entof thelss'crewz.

' ".Forrfperformingaa boring:operation,ithe :bar 12 6 i and" support 'l 28 lare assembled fin f association 'wfith'theframe 'I 0 :as e showniin .'Figs. .1 zand 3. 1Ridial4adjustment-of ithe :boring i bar.i33;is' 'obltained through the.. medium of themadjusting rscrewl 35,1' and the .slide 232 r. which? supports the 'lboiing lloar,- may f be locked i in any .position tof lradiali adjustment bylaflclampf screw 38. 'As :the ot-3 I, lr-iniwhich the slide 532 .is 'received,.is"open, "Tthefclamp'fscrewf canibefrel'eased '.atfany time `=iandithe-fsl-ide 32 .andboring bar233 removedfto ifailitate gaugingfor caliperinglthef diameter of 'the'hole'being`1bored. If .theifpos'ition :of the `=ldjust-ing screw-f35`fis not changed, the slide '32 maart-be reinsertedf'into lits 'original position .in `the'--support`28. inthefcase'iof aturning 4op- .f eration; boring is:v performed AV:byfmanually if eed- "lngthe device axfially oi' the stock: while the stock ffandlfra'me L I0 fv-areibeing :rotated 1 relatively to --'each ether. l i i .It itisidesiredutoV d'rilLtheendof thestock; the support 2fisreversedontherbari2 6, .as .indicated ii-n Figi. 'Land-the? drillziszsupporte'd rconcent'rically in the opening 29, being heldfstationarythereilin asnby `means of..a.set"screwl0.

l"'lI/Iillingt operations on# small piecesfmay :be per- `lthis'instance?.an iendmillingi'cutter, mounted'. on vaniarborl 42,':whichfis rotatably 4supportedfcon- -`rserewi,Risi secured' atithe inner .ien'dof that slide :Ii i L*With `the slideadjiistedl to bring the .screwheadwithin" the1 periphery-:of thecutterf 4 I and with the cutter and frame being relatively rro- "-tated, theframees vmoved4 axially of the Ycutter '"'untilffthe f blankf'head. haslbeen milled; to .the Vde- `lfsireci depth. fItilwillfbetobvious,that;other types 'fof mill-ing' A'operations may `be nperformed'with Aithinl cutter: or saw in place. ofi the 2 end'mill L4 I The method by which such relative 4 diametrically extending slots can be produced in the head of a screw by mounting the screw at the inner end of the slide I6 and by feeding such slide radially inward.

In Fig. 8, we have illustrated a set-up suitable for use where stock is to be turned to a relatively small diameter for a relatively great ex- '.tent. In this instance;' the support, 28"is.mountcd on the'barZS with theslot 3 I` exteriorly disposed,

the slide 32 is removed, and the turned stock is 4`supported in the opening 29, through the medium of'a bushing disposed in said opening.

Tofacilitate use of the device in a drill press fthe'fouteraxiallyfpresented face of the arm I5 l5*l 'may' -be machined plane and normal to the axis ofthebearing I I. so that it may rest on the table 46 of the drill press while the stock is supported -in-thedrill-press chuck 4l, as indicated in Fig. 4.

Similarly, if the axially presented faces of the -supportff28-are machined-plane 'and normal to the axisfof theI bearing. I'I .the support 23V, when 'it .isbeingusedV may be rested upon ztheltableof 'a' drillpress by whichthe-stock is rotated.

:'It isfto'benoted that in all arrangements shown; as well as in others of which thetdevice is capable, the'tool isheldfin proper alignment rwith the work bythe t ofthe stock within the This is a decided advantage as'it thestock-and the-.axis` about vwhich it is rotated. Further, by supporting the tool directlyfrom'. the

Y*bearing we eliminate anyfchatterresulting from :lost-motion `in the bearings of the spindle *by -Whichthe work isrotated. In v1 turning multi- -Wec'laim'asfour invention: Y A `metabworking device, comprising a `bear- :ing :having f an elongated' bore i .adapted to reand extending from thev bearing in. a direction .mounted .on said.- member` in spaced i relationy to .the Lbearing, said tool (support being provided. on theside facingsaidbearing with/.an open groove .extending radiallyofY the bearing-axis, aV radially adjustableslide in said lgroove,l anadju'stable `abutment carried bysaid tool-support to locate saidslide, and. means for clamping thefslide in .anyposition -of radial adjustment,'said slide ibe- 55.

ing pr'ovided with'means for supporting abor- 5 RAYMOND A. 7 MILLHOLILAND.

ERNEST MILLHOLLAND.

fREFERENoEs `CITED lThe following references are Aof vrecord inthe vfiileof this patent:

UNITED STATES PATENTS 

